| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [adv] be | 276 |
|
| 2 | [Wh pn] could not be | 52 |
|
| 3 | [Wh pn] could [adv] be | 50 |
|
| 4 | [Wh pn] could not [adv] | 39 |
|
